UV Disinfection of Low Transmittance Pharmaceutical Wastewater

$17.50 plus tax (Refund Policy)

Buy Article:


An UV disinfection system located at an activated sludge plant treating wastewater from a research pharmaceutical facility was performing unsatisfactorily. The plant had to rely on chlorine addition to meet its fecal coliform limit. Initially, interference from ferric chloride, which is used for phosphorus removal, was suspected. Ferric chloride was replaced with alum, but no improvement in UV effectiveness was noted. A review of the plant performance data indicated a direct correlation between effluent COD concentration, UV transmittance and UV effectiveness. A subsequent plant process evaluation revealed an inadequate operation of the activated sludge system. The plant was reseeded and the operation was optimized resulting in improved COD removal and UV performance. However, even optimized biological treatment did not improve effluent UV transmittance beyond the 40 to 50% range, considerably less than the 65% level, which is typical for treated municipal effluent. The poor UV transmittance and substandard UV effectiveness was attributed to UV-adsorbing organics which were incompletely degraded in the activated sludge process.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864705783978221

Publication date: January 1, 2005

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • ingentaconnect is not responsible for the content or availability of external websites



Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more